Improvement in scale-beams



S. G. BARKER.

Scale Beam.

m'zne6565 Patented Nov. 4, 1862i (7 ki we? @NITED STATES PATENT rtree.

SAMUEL G. BAKKER, OF CARBONDALE, PENNSYLVANIA.

MPROVEMENT IN SCALEHBEAMS.

Specification forming part of Letters Patent N0. 36,@23, dated November1, 15H7?.

To all whom it may concern,.-

Beit known that I, SAMUEL G. BAKKER, of Carbondale, in the county ofLuzerne and State of Pennsylvania, have invented a new and usefulImprovement in Beams for Veighing, and I do hereby declare that thefollow ing is a full, clear, and exact description of the constructionand operation of the same, reference being had to the accompanyingdrawings, making a part of this specification, in which- Figure l is aside view, and Fig. 2 a top view, of the improvement applied, likeletters indicating the same parts when in the two gures.

The nature of my invention consists in the mode hereinafter describedand specified of making the suspension-point or knife-edge of aweighingbeam adjustable both vertically and longitudinally upon the saidbeam, substantially as hereinafter described, for the purpose offacilitating in the regulating of the same to suit the pea and weightsin manufacturing, and also for the purpose of enabling the weigher tochange the position of the said suspension-point in relation to thefulcrum so that he can at any time readily adapt the beam or scale toeither gross or net weight or foreign standards.

In the drawings, A is the beam; B, an adjustable slide which carries thesuspensionpoint c,- d, the fulcrum; e, the point for supporting theusual counterpoising-weights, and f the ball for adjusting the center ofgravity of and balancing the beam. Forward of the fulcrum d the beam Ais made in this instance in the usual well-known form for aplatform-scale, but between the fulcrum and the extreme rear end of thepiece of which the beam is made it is constructed to have parallel sidesand edges, for the purpose of receiving upon it the slide B, whichlatter is mortised longitudinally through its center in such a manner orform that while its interior side surfaces fit accurately and closelyagainst the two sides of the beam A it will leave a parallel spacebetween it and either of the edges ofthe said beams in rear of thefulcrum d, for the purpose of allowing the said slide B to be eitherraised or lowered as the proper line through its point o and the fixedpoints (Z and c may require. Projecting from this slide B there is astud or boss, g, in which is fixed firmly a threaded stem, 7i, providedwith two janrnuts, fz' t', and projecting from the beam A there is alsoprovided a stud or boss, 7e, having a hole through it which freelyadmits the threaded stem h, and in such a manner that when the nuts t' iare respectively screwed up against the opposite sides of the said boss75 the slide B will be kept from being moved longitudinally in eitherdirection. On the under edge of the said slide there is another boss, Z.This receives and supports a thumlrscrew, on, in such a manner that thelatter can be used as a set-screw and operate in conjunction with aplate, a, of any suitable thickness, for the purpose of keeping thepoint or knifeedge c at a proper height upon the beam, substantially asrepresented in Fig. l.

It preferred, two set-screws may be inserted through the upper edge ofthe slide B, so as to form two separate upper bearings for the upperedge of the beam in the same as sub stitutes for the plate a.

It will be readily seen that the slide B can be moved either verticallyor longitudinally, or both, and then firmly secured at any requisiteposition on the beam A, and consequently that the point ofsuspension orknifeedge c can be adjusted with the greatest ac curacy and facility tothe line and distance from the fulcruni required.

On the rear end of the beam A there is fixed securely avertically-slotted piece, o, and in the rear slot thereof the threadedstem p, which is traversed by the ball f in the usual manner, isadjusted and secured by two jamnuts, q q, so as to projectback therefromhorizontally at any height the proper vibration of the beam may require.It will therefore be seen that when the beam is suspended in the usualpost of a platform-scale a more free access will be afforded by thisarrangement for rot-ating the ball f, and thus balancing the beam asoccasion frequently requires. lt will be manifest that the fulcrum-pointmay be made adjustable in the same manner instead of thesuspension-point, as described. Therefore I do not intend to eonfinemyintenn tion to the suspension-point alone 5 but,

Having fully described my improvement and shown its utility, what Iclaim as new therein of my invention, and desire to secure by LettersPatent, is-

Making the suspensionpoint c adjustable upon the beam A by ineens of theSlide B, in combination with the threaded stem h, jamnuts z' i', boss k,and thumbsorew m, the saine being arranged to operate substantially inthe manner described, for the purposes specified.

SAMUEL G. BARKER. Titnessesz WILLIAM ROOT,

ABEL BARKER.

